Mattress topper



FIG. 1 is a front view of the mattress topper showing the new design, lying flat.

FIG. 2 is a back view of the mattress topper shown in FIG. 1, lying flat.

FIG. 3 is a detail of the top corner of the back view of the mattress topper shown in FIG. 2.

FIG. 4 is a left side view of the mattress topper shown in FIG. 1, the right side view being identical to the left side view.

FIG. 5 is a bottom perspective view of the mattress topper shown in FIG. 1; and,

FIG. 6 is a top view of the mattress topper depicted in FIG. 1, the bottom view being identical to the top view.

The broken lines in the drawings represent the portions of the mattress topper, which form no part of the claimed design. 

CLAIM The ornamental design for a mattress topper, as shown and described. 